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Novel Discotic Boroxines: Synthesis and Mesomorphic Properties
Tobias Wöhrle1, Angelika Baro2, Sabine Laschat3
1Institut für Organische Chemie, Universität Stuttgart, Pfaffenwaldring 55, Stuttgart D-70569, Germany. tobias.woehrle@oc.uni-stuttgart.de.
Materials (Basel, Switzerland)
|August 10, 2017
Summary
Researchers developed a new synthesis for triphenylboroxines, discovering they exhibit liquid crystal properties. These materials show broad mesophases near room temperature, with potential applications in advanced materials science.
Area of Science:
- Organic Chemistry
- Materials Science
- Crystallography
Background:
- Triphenylboroxines are a class of organic compounds.
- Understanding their mesomorphic properties is crucial for potential applications.
Purpose of the Study:
- To develop a novel synthetic route for highly substituted triphenylboroxines.
- To investigate the liquid crystalline behavior of these synthesized compounds.
Main Methods:
- Synthesis of triphenylboroxine derivatives.
- Differential scanning calorimetry (DSC) for thermal analysis.
- Polarizing optical microscopy (POM) for texture observation.
- X-ray diffraction (SAXS, WAXS) for structural confirmation.
Main Results:
- Successful synthesis of highly substituted triphenylboroxines.
- Tris(3,4,5-trialkyloxy)phenyl derivatives (11b-e) exhibited broad mesophases with alkyl chain lengths of C9 or greater.
- Mesophase widths decreased with increasing alkyl chain length.
- Columnar hexagonal (Colh) mesophase symmetry was observed and confirmed.
Conclusions:
- The new synthetic approach yields triphenylboroxines with tunable mesomorphic properties.
- These compounds demonstrate potential as liquid crystalline materials.
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